JPS5817161B2 - Foaming termiticide - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anti-termite agent, and particularly to a conventional anti-termite agent that is formulated to have foaming properties.

In general, termite repellents use organochlorine insecticides such as dieldrin, alredrin, and chlordane as their insecticidal and repellent ingredients, and are applied or sprayed on the wood and soil under the floors of buildings for a long period of time. I am trying to get a migratory insect repellent effect.

; Conventionally, this chemical has been applied and dispersed by brushing, spraying, etc., but with these methods, it may not be possible to absorb a sufficient amount into the wood under the floor with one application. In addition, in the spray treatment, there is a problem that the drug becomes atomized and remains suspended in the air for a long time, which may have an adverse effect on the human body.

Furthermore, in existing buildings, workers must peel off floorboards, tatami mats, etc. to get under the floors and spray chemicals.
There was a problem that workability such as labor and time was poor.

This invention was devised to solve the above-mentioned problems, and is disclosed in Japanese Patent Application Laid-open No. 52-114023 entitled "Method of dispersing termite control agent" filed by one of the applicants.
In this paper, a method of dispersing the drug in the form of foam was shown, and this article relates to the composition of the foaming anti-termiticide agent.

The effervescent termiticide of the present invention includes dieldrin (hexachlor epoxy octahydro endo-exo-dimethanonaphthalene, Cl2H8c160), aldrin (
Hexachlor-hexahydro-ene9do-exo-dimethanonaphthalene, C12Hg C4), or chlordane (octachlor-hexahydro-methanoindene, C
An organic chlorine insecticide such as 1oH6c18) is dissolved in a hydrocarbon solvent, and anionic interfaces such as alkyl sulfate, polyoxyethylene alkyl 5 ether sulfate, α-olefin sulfonate, and alkylbenzene sulfonate are added to this solution. An activator, a zwitterionic surfactant such as alkyl dimethyl betaine, and a mixture of one or more surfactants selected from high-quality aliphatic alcohols having 10 to 18 carbon atoms, alkylene glycol, alkylene glycol mono 1 selected from alkyl ethers or polyalkylene glycol monoalkyl ethers
Add a blowing agent dissolved in a mixture of seeds or a mixture of two or more organic solvents to reduce the concentration of the organochlorine insecticide to 0.25.
It is prepared by diluting it with water to a concentration of 3% to 3%.

The effervescent termiticide of the present invention having the composition as described above,
The foam is sprayed onto the underfloor ring of the building using the foam spraying device shown in the drawing.

This foaming and dispersing device consists of a chemical tank 1, a pump 2, and a foamer 3. The foamer 3 includes a water motor 31, a fan 32,
, a nozzle 33, and a foam net 34, the chemical liquid is pressurized by the pump 2 and supplied to the water motor 31, which drives the fan 32, and the chemical liquid is sent to the nozzle 33. The foam is atomized and blown onto the foam net 34, generating a large amount of foam.

The foaming termiticide supplied under the building floor in this way has appropriate fluidity, so it gradually fills the underfloor area, and is able to reach the back side of objects that are difficult to adhere to with conventional spraying. The drug also completely adheres to the surface.

Also, the foam that is generated will defoam for a long time. The drug is fully absorbed by the water solution on the underside of the floor or on the pillars.

Therefore, the foaming anti-termiticide of the present invention exhibits an excellent effect of dispersing and depositing the chemical even in the narrow space under the floor where it is difficult for humans to enter.

The following is a guideline for the filling time for spraying the foaming anti-termite agent under the floor of a building.

The amount of foaming anti-termite agent discharged by the foaming spraying device was 1577.
m1n, and when the expansion ratio of the foam is adjusted to about 150 times, it is necessary to fill the underfloor space.

The time will be as shown in the table below.

If we assume that it takes 15 minutes for the foam to disappear to 1/2, then 2
．． The amount of foam fed at 25 m37 min after 15 minutes is reduced by 0.75 times, leaving about 25.3771' of foam.

Therefore, the time it takes for the under-floor space volume of 20 tsubo (approximately 26 m3) to be filled with foam, as shown in the table below, is 1.
It will take a little over 5 minutes.

From this, the actual foam filling time will be 1.25 times longer than the time shown in the table above.

From the above considerations, if the foam has a 1/2 defoaming time longer than 15 minutes, the spraying process for an underfloor area of about 20 tsubo can be performed in about 15 minutes.

However, in reality, the time required for filling varies slightly depending on the degree of dryness and wetness of the soil, and whether the soil is viscous or sandy.

Next, the invention of the present application will be explained in detail with reference to Examples.

In each example, foaming was carried out by changing the mixing ratio of the termiticide (dieldrin, aldrin, or chlordane) and the foaming agent.
The effectiveness of the anti-termite treatment was determined by measuring the state of the bubbles generated and the amount of the anti-termite agent adsorbed onto the surface of the test piece of wood.

The foam dispersion was carried out using the foam dispersion device described above.

The test piece of wood used was cedar wood whose end surface was coated with epoxy resin to prevent penetration of the chemical solution from the end surface, and had a surface area of 45C17.

This test piece of wood is hung under the floor, filled with a foaming anti-termite agent, and taken out after defoaming. From the difference between the weight of the test piece before spraying and the weight after spraying, the amount of adsorption of the anti-termite agent per unit is determined. The amount was converted and shown.

The effective adsorption amount of foaming termiticides is usually about 200 g/m (2
Therefore, the effective adsorption amount of dieldrin and aldrin is about 0.1 to /d1 and about 0.0.
It is 47% i/i.

Example 1゜In this example, dieldrin was used to measure the foaming state of a foaming anti-termiticide with the following mixing ratio and the amount of adsorption of the anti-termite agent onto a test piece of wood, and the results are shown in Table 1. .

Composition of anti-termite agent (AI agent) Dieldrin...20f0 Hydrocarbon solvent (Shellzol AB, manufactured by Shell Oil Co., Ltd.)
Composition of foaming agent (B1 agent) Sodium polyoxyethylene lauryl sulfate...10
% Sodium lauryl sulfate...10% Lauryl alcohol...3% Ethylene glycol-1o% 1 Diethylene glycol monobutyl ether...1
0% Water...57% In the above test, the solution discharge amount of the foaming spraying device was 15%.
The speed was adjusted to 1/min.

In Table 1, the numerical value in parentheses in the column of adsorption amount of chemical solution indicates the adsorption amount of dieldrin.

In test numbers 1 to 3, both the adsorption amount of the chemical solution and the state of the foam were good.

In test numbers 4 and 5, the adsorption amount of the chemical solution was higher than the standard value, but the adsorption amount of dieldrin was slightly lower.

However, this amount of adsorption is sufficient for practical use.

Moreover, the stability of the foam was good. In Test Nos. 6 and 7, the concentration J of dieldrin was low, and the adsorption amount of the chemical solution was insufficient for practical use.

In test numbers 8 and 9, the adsorption amount of the chemical solution was small, but
However, since the concentration of dieldrin was high, the amount of adsorption of the termite control agent was sufficient.

In addition, although the stability of the foam was not very good, it was sufficiently usable for practical use.

Judging from the above results, the concentration of dieldrin is 0.2
It is best to use it by adjusting it within the range of 5 to 1.0.

Example 2 In this example, chlordane was used to measure the foaming state of foaming anti-termiticides with the following mixing ratio and the amount of adsorption of the anti-termiticides to test wood pieces, and the results are shown in Table 2. .

Composition of termiticide (A2 agent) Chlordane ・・・60 person Hydrocarbon solvent (white kerosene)...40% Blowing agent composition The B1 agent used in Example 1 was used.

The solution discharge rate of the foaming spraying device was 157/mi as in Example 1.
It was done with n.

The numerical value in parentheses in the column of adsorption amount of chemical solution indicates the adsorption amount of chlordane.

In test number 10.11, the adsorption amount of the chemical solution and the stability of the foam were also good.

In test number 12.13, the amount of adsorption of the chemical solution was sufficient, but the amount of adsorption of chlordane was somewhat low. However, this amount of adsorption is sufficient for practical use.

In addition, the condition of the foam was good with increased expansion ratio and durability.

In test number 14.15, the adsorption amount of the chemical solution was sufficient, but the adsorption amount of chlordane was quite low and was insufficient for practical use.

Judging from the above results, the concentration of chlordane is 2.0~
It is best to adjust the atmosphere to a range of 3.0%.

Example 3 In this example, a mixture of dieldrin and aldrin was used, and the foaming state of the foaming anti-termiticide at the following mixing ratio and the amount of adsorption of the anti-termiticide onto the test wood piece were measured, and the results are shown. Shown in 3.

Composition of termiticide (A3 agent) Dieldrin...10th grade Aldrin...10th grade hydrocarbon solvent (Sierudur AB/Shell Oil Co., Ltd.)
Composition of 80 foaming agent Agent B used in Example 1 was used.

The above test conditions are the same as in Example 1.

In test numbers 16 to 22, both the adsorption amount of the chemical solution and the foaming state were good.

Therefore, the mixed concentration of dieldrin and andrin is set to 0.2
It is best to use 5-1.0% newspaper.

Example 4 0 In this example, various foaming agents were used to measure the foaming state and the adsorption amount of the anti-foaming agent to the test piece of wood.

Agent A1 of Example 1 was used as the termite control agent. The following composition of the blowing agent was used.

Note that the test method was the same as in Example 1.

The results are shown in Table 4.

The test conditions were the same as in Example 1.

The numerical value in parentheses in the column of adsorption amount of chemical solution indicates the adsorption amount of dieldrin.

In test number 27.29, the adsorption amount of dieldrin was rather low, but there was no problem in practical use.

In the other test numbers, there were slight differences in the state of the foam, but in all cases the treatment effect of the chemical was sufficient for practical use.

Judging from the above results, it is optimal to adjust the surfactant concentration in the foaming agent composition to 10% to 45% and the concentration of organic solvent such as glycol or ether to 10% to 40%.

As is clear from the description of Examples 1 to 4 above, the foaming termite control agent of the present invention can be applied extremely easily and effectively when performing termite control in houses, etc. Since the chemical can be absorbed into wood etc., it has an excellent anti-termite effect.

[Brief explanation of drawings]

The drawing is a schematic diagram of the foam dispersion device used in the tests of the present invention. 1... Chemical tank, 2... Pump, 3
・・・・・・Foaming machine.

Claims (1)

[Scope of Claims] 1a) A solution in which one or more organochlorine insecticides selected from dieldrin, aldrin, and chlordane are dissolved in a hydrocarbon solvent. b) Anionic surfactant of alkyl sulfate salt, polyoxyethylene alkyl ether sulfate salt, α-olefin sulfonate salt, alkylbenzene sulfonate salt, zwitterionic surfactant of alkyl dimethyl betaine, and carbon number 10 to 18 A mixture of one or more surfactants selected from higher aliphatic alcohols. C) A mixture of one or more organic solvents selected from alkylene glycol, alkylene glycol monoalkyl ether, and polyalkylene glycol monoalkyl ether, and water. A foaming anti-termiticide composition containing the above a) to C), characterized in that the concentration of the organochlorine insecticide is adjusted to 0.25 to 3.0% by weight.